P.Th.F.M. Boekholt, J. van der Kooi, Spiegel van Groningen. Over de schoolmeesterrapporten van 1828. BMGN - Low Countries Historical Review, [S. l.], v. 113, n. 1, p. 120–121, 1998. DOI: 10.18352/bmgn-lchr.4652. Disponível em: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-105348.. Acesso em: 2 jul. 2024.